Aqueously Dispersed Silver Nanoparticle-Decorated Boron Nitride Nanosheets for Reusable, Thermal Oxidation-Resistant Surface Enhanced Raman Spectroscopy (SERS) Devices
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- 作者：Yi Lin ; Christopher E. Bunker ; K. A. Shiral Fernando ; John W. Connell
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2012
- 出版时间：February 22, 2012
- 年：2012
- 卷：4
- 期：2
- 页码：1110-1117
- 全文大小：393K
- 年卷期：v.4,no.2(February 22, 2012)
- ISSN：1944-8252
文摘
The impurity-free aqueous dispersions of boron nitride nanosheets (BNNS) allowed the facile preparation of silver (Ag) nanoparticle-decorated BNNS by chemical reduction of an Ag salt with hydrazine in the presence of BNNS. The resultant Ag鈥揃NNS nanohybrids remained dispersed in water, allowing convenient subsequent solution processing. By using substrate transfer techniques, Ag鈥揃NNS nanohybrid thin film coatings on quartz substrates were prepared and evaluated as reusable surface enhanced Raman spectroscopy (SERS) sensors that were robust against repeated solvent washing. In addition, because ofthe unique thermal oxidation-resistant properties of the BNNS, the sensor devices may be readily recycled by short-duration high temperature air oxidation to remove residual analyte molecules in repeated runs. The limiting factor associated with the thermal oxidation recycling process was the Ostwald ripening effect of Ag nanostructures.